400 Bad Request

Hi all,

I have visited certain websites with Google Chrome and Safari, and often see "400 Bad Request The plain HTTP request was sent to HTTPS port". How can the problem be fixed? Thanks in advance.

MacBook Air 13", macOS 10.14

Posted on Mar 6, 2020 7:09 AM

Similar questions

Showing SSL error for genuine sites (links from google search results) and then getting routed to spam advertising sites. I am facing this problem on both my iPhone and on my Macbook. The Safari is showing links for google search results as not having valid SSL certificates. When I click proceed to site, I get routed to this IP address always - http: //89.208.103.43. From there, the browser automatically shows many spam Advertising sites. This happens simultaneously on my iPhone as well as on my Macbook. This is only on Safari. If I use Microsoft Edge, this problem vanishes. When I go back to Safari, the same problem is seen. I have tried resetting the Safari on Iphone and clearing website data and cookies on Safari, Macbook. Still the problem somehow comes back. I am also worried about Malware or something like that installed in my devices. Please help. [Link Edited by Moderator]
7574 9
Every other HTTP (SSL) request fails Hey! I do have the issue on my MacBook Air M1 2020 for quite a while now. Unrelated if using Safari, or other outgoing HTTP Requests - they do fail so often, that it's quite annoying now. In Safari it's the typical error message, that Safari "can't establish a secure connection". When requests are sent from third-party-apps those throw other errors (but most likely relate to them) - in NodeJS e.g. ERCONNRESET or generic errors, that no connection could be established. That issue persisted in the last version of Ventura and now on Sonoma as well. I don't run any kind of antivirus-software which could block something. And I don't really think that this is an issue on the routers end or something, as those problems do not occur on my iPhone nor my SmartTV whatsoever. Sadly I don't have any starting point to investigate into this issue further.
5977 8
BAD REQUEST Need help on how to fix the following issue: Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit. Apache/2.4.29 (Ubuntu) Server at 10.146.196.49 Port 80 V/R, John
7644 4

1 reply

dominic23

Level 10

84,018 points

Mar 6, 2020 9:00 AM in response to francislau17

1. Enable Develop menu. https://support.apple.com/guide/safari/use-the-developer-tools-in-the-develop-menu-sfri20948/mac

Click “Develop” in the menu bar and then “Empty Caches” twice.

2. Quit Safari if open.

Hold the "option" key down and click the "Go" menu in the Finder menu bar.

Select "Library" and then "Caches".

Look for the folder 'com.apple.Safari"

Right click "com.apple.Safari" and select "Move to Trash"

Relaunch Safari.

3. Remove All Website Data.

Remove stored cookies and data: Click Manage Website Data, select one or more websites, then click Remove or Remove All.

https://support.apple.com/guide/safari/manage-cookies-and-website-data-sfri11471/mac

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

400 Bad Request

Welcome to Apple Support Community

A forum where Apple customers help each other with their products. Get started with your Apple Account.

Learn more Sign up